| Mucosal Immunity and Illness Incidence in Elite Rugby Union Players across a Season. | |
| | |
MedLine Citation:
|
PMID: 20631639 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
PURPOSE: : To examine the relationship between upper respiratory illness (URI) incidence with changes in mucosal immunity (saliva immunoglobulin A (s-IgA) and saliva lysozyme (s-Lys)) and training load (TL) in a squad of elite rugby union players. METHODS: : Timed resting morning saliva samples were taken from players (n = 31) at preselected time points for 11 months. Weekly illness rates and TL were assessed using a Web-based diary and from medical/coaching staff reports. RESULTS: : No significant correlation was found between absolute s-IgA or s-Lys concentrations and URI incidence. Peaks in URI (December and March) were preceded by periods of increased training intensity and reduced game activity. In 23% of all URI episodes, players reported that presence of an illness either reduced activity (14.4%) or felt the need to go to bed (8.6%). When s-IgA concentration was expressed relative to that when in a URI-free state, a 15% reduction (P = 0.08) was observed in individuals who had present URI symptoms. Decreases in absolute s-IgA (December) and s-Lys (November and February) concentrations were associated with a corresponding increase in saliva cortisol (P < 0.05). Lower s-IgA (P < 0.05) and s-Lys concentrations were consistently observed in backs than forwards, whereas URI incidence also differed for player position (3.4 forwards vs 4.3 backs). CONCLUSIONS: : Regular monitoring of s-IgA and s-Lys may be useful in the assessment of exercise stress and URI risk status in elite team sport athletes. A combination of alterations in training intensity and seasonal influence is a likely contributor to observed peaks in URI incidence. It is probable that stress-induced increases in cortisol release contribute to reductions in mucosal immunity, which, when lowered, predispose rugby players to increased risk of illness. |
| | |
Authors:
|
Brian Cunniffe; Hywel Griffiths; Wayne Proctor; Bruce Davies; Julien S Baker; Ken P Jones |
Related Documents
:
|
15273179 - Effect of incorporating low intensity exercise into the recovery period after a rugby m... 18550969 - Effects of training exercises for the development of strength and endurance in soccer. 9407259 - Effects of creatine supplementation on repetitive sprint performance and body compositi... 21264069 - Impaired oxidative phosphorylation in overtrained rat myocardium. 9317309 - Gas transport in the haemolymph of arachnids - carbon dioxide transport and acid-base b... 19704379 - Salivary immunoglobulin a response to a match in top-level brazilian soccer players. 8902309 - Effect of physical fitness on plasma lipids in young chinese adults. 2374829 - Effects of moderate and low intensity long-term exercise by older adults. 14581289 - Chemoreflex drive and the dynamics of ventilation and gas exchange during exercise at h... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Medicine and science in sports and exercise Volume: 43 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2011 Mar |
Date Detail:
|
Created Date: 2011-02-17 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
|
Languages: eng Pagination: 388-97 Citation Subset: IM; S |
Affiliation:
|
1Department of Health, Exercise, Sport and Science, University of Glamorgan, Wales, UNITED KINGDOM; 2Wales Rugby Union, Hensol, Nr Cardiff, Vale of Glamorgan, Wales, UNITED KINGDOM; 3Division of Sport and Exercise Science, School of Science, University of the West of Scotland, Hamilton Campus, Scotland, UNITED KINGDOM; and 4Cardiff School of Health Sciences, University of Wales Institute Cardiff, Wales, UNITED KINGDOM. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Prognostic stratification of stage IIIA pN2 non-small cell lung cancer by hierarchical clustering an...
Next Document: Diaphragm fatigue after submaximal exercise with chest wall restriction.